(a) If the death of a nonmember spouse occurs while the nonmember spouse is receiving an annuity under the Defined Benefit Supplement Program, the final benefit shall be payable in accordance with the terms of the annuity elected by the nonmember spouse.
(b) If the nonmember spouse was receiving a single life annuity without a cash refund feature, a final benefit is not payable.
(c) If the nonmember spouse was receiving a single life annuity with a cash refund feature, the final benefit shall be payable in a lump sum to the nonmember spouse’s beneficiary.
(d) If the nonmember spouse was receiving a period certain annuity, the remaining balance of payments shall be paid to the payee designated by the nonmember spouse pursuant to Section 22660.